Connecting SCALANCE M-800 to WAN   
1.2 Connecting M81x to ADSL 
  SCALANCE M-800 Getting Started 
42  Getting Started, 06/2015, C79000-G8976-C337-04 
1.  Click on "Security" > "Firewall" in the navigation area and on the "Predefined IPv4" tab in 
the content area. 
2.  Under "From Internal to External", enable "Allow IP Traffic". 
3.  Click "Set Values".